[libvirt] [PATCH v2 7/9] qemu: add helper for getting full FSInfo
Jonathon Jongsma
jjongsma at redhat.com
Fri Aug 23 14:00:04 UTC 2019
On Thu, 2019-08-22 at 19:02 -0300, Daniel Henrique Barboza wrote:
> This patch fails to compile in my env throwing this error:
>
>
> CC qemuagenttest.o
> qemuagenttest.c: In function
> 'testQemuAgentGetFSInfoCommon.constprop':
> qemuagenttest.c:242:5: error: 'ret_def' may be used uninitialized in
> this function [-Werror=maybe-uninitialized]
> 242 | virDomainDefFree(ret_def);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~
> cc1: all warnings being treated as errors
> make[2]: *** [Makefile:5856: qemuagenttest.o] Error 1
>
>
> I attempted to fix it by doing:
>
> ----
>
> diff --git a/tests/qemuagenttest.c b/tests/qemuagenttest.c
> index be53f7e61a..00dcf26681 100644
> --- a/tests/qemuagenttest.c
> +++ b/tests/qemuagenttest.c
> @@ -175,7 +175,7 @@
> testQemuAgentGetFSInfoCommon(virDomainXMLOptionPtr xmlopt,
> int ret = -1;
> char *domain_filename = NULL;
> qemuMonitorTestPtr ret_test;
> - virDomainDefPtr ret_def;
> + virDomainDefPtr ret_def = NULL;
>
> if (!test || !def)
> return -1;
>
> ------
>
> I was able to compile it, but then 'make check' got rekt:
>
> ----
> [...]
> PASS: qemudomainsnapshotxml2xmltest
> PASS: qemucommandutiltest
> PASS: virsh-cpuset
> ../build-aux/test-driver: line 107: 19017 Segmentation fault
> (core dumped) "$@" > $log_file 2>&1
> FAIL: qemuagenttest
> PASS: qemumigparamstest
> [...]
> =====================================================================
> =======
> Testsuite summary for libvirt 5.7.0
> =====================================================================
> =======
> # TOTAL: 129
> # PASS: 127
> # SKIP: 1
> # XFAIL: 0
> # FAIL: 1
> # XPASS: 0
> # ERROR: 0
> -----
>
>
> Not sure if there is something wrong with the patch, or with the fix
> I made (seems unlikely, but ...) or perhaps something else missing in
> my
> env (is there any external libs needed for this?).
>
>
> Thanks,
>
>
> DHB
Hmm, sorry for the sloppiness. I ran these tests multiple times, but
apparently after a final rebase, I introduced something that I failed
to catch before submitting. Thanks for testing it out.
Jonathon
>
>
> On 8/21/19 7:15 PM, Jonathon Jongsma wrote:
> > This function adds the complete filesystem information returned by
> > the
> > qemu agent to an array of typed parameters with field names
> > intended to
> > to be returned by virDomainGetGuestInfo()
> > ---
> > src/qemu/qemu_agent.c | 89 ++++++++++++++++++
> > src/qemu/qemu_agent.h | 5 +
> > tests/qemuagenttest.c | 210
> > +++++++++++++++++++++++++++++++++++++++---
> > 3 files changed, 291 insertions(+), 13 deletions(-)
> >
> > diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c
> > index d5519cb243..c101805b23 100644
> > --- a/src/qemu/qemu_agent.c
> > +++ b/src/qemu/qemu_agent.c
> > @@ -1953,6 +1953,95 @@ qemuAgentGetFSInfo(qemuAgentPtr mon,
> > virDomainFSInfoPtr **info,
> > return ret;
> > }
> >
> > +int
> > +qemuAgentGetFSInfoParams(qemuAgentPtr mon,
> > + virTypedParameterPtr *params,
> > + int *nparams, int *maxparams,
> > + virDomainDefPtr vmdef)
> > +{
> > + int ret = -1;
> > + qemuAgentFSInfoPtr *fsinfo = NULL;
> > + size_t i, j;
> > + int nfs;
> > +
> > + nfs = qemuAgentGetFSInfoInternal(mon, &fsinfo, vmdef);
> > +
> > + if (virTypedParamsAddUInt(params, nparams, maxparams,
> > + "fs.count", nfs) < 0)
> > + goto cleanup;
> > +
> > + for (i = 0; i < nfs; i++) {
> > + char param_name[VIR_TYPED_PARAM_FIELD_LENGTH];
> > + snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> > + "fs.%zu.name", i);
> > + if (virTypedParamsAddString(params, nparams, maxparams,
> > + param_name, fsinfo[i]->name) <
> > 0)
> > + goto cleanup;
> > + snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> > + "fs.%zu.mountpoint", i);
> > + if (virTypedParamsAddString(params, nparams, maxparams,
> > + param_name, fsinfo[i]-
> > >mountpoint) < 0)
> > + goto cleanup;
> > + snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> > + "fs.%zu.fstype", i);
> > + if (virTypedParamsAddString(params, nparams, maxparams,
> > + param_name, fsinfo[i]->fstype)
> > < 0)
> > + goto cleanup;
> > +
> > + /* disk usage values are not returned by older guest
> > agents, so
> > + * only add the params if the value is set */
> > + snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> > + "fs.%zu.total-bytes", i);
> > + if (fsinfo[i]->total_bytes != -1 &&
> > + virTypedParamsAddULLong(params, nparams, maxparams,
> > + param_name, fsinfo[i]-
> > >total_bytes) < 0)
> > + goto cleanup;
> > +
> > + snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> > + "fs.%zu.used-bytes", i);
> > + if (fsinfo[i]->used_bytes != -1 &&
> > + virTypedParamsAddULLong(params, nparams, maxparams,
> > + param_name, fsinfo[i]-
> > >used_bytes) < 0)
> > + goto cleanup;
> > +
> > + snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> > + "fs.%zu.disk.count", i);
> > + if (virTypedParamsAddUInt(params, nparams, maxparams,
> > + param_name, fsinfo[i]->ndisks) <
> > 0)
> > + goto cleanup;
> > + for (j = 0; j < fsinfo[i]->ndisks; j++) {
> > + qemuAgentDiskInfoPtr d = fsinfo[i]->disks[j];
> > + snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> > + "fs.%zu.disk.%zu.alias", i, j);
> > + if (d->alias &&
> > + virTypedParamsAddString(params, nparams,
> > maxparams,
> > + param_name, d->alias) < 0)
> > + goto cleanup;
> > +
> > + snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> > + "fs.%zu.disk.%zu.serial", i, j);
> > + if (d->serial &&
> > + virTypedParamsAddString(params, nparams,
> > maxparams,
> > + param_name, d->serial) <
> > 0)
> > + goto cleanup;
> > +
> > + snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> > + "fs.%zu.disk.%zu.device", i, j);
> > + if (d->devnode &&
> > + virTypedParamsAddString(params, nparams,
> > maxparams,
> > + param_name, d->devnode) <
> > 0)
> > + goto cleanup;
> > + }
> > + }
> > + ret = nfs;
> > +
> > + cleanup:
> > + for (i = 0; i < nfs; i++)
> > + qemuAgentFSInfoFree(fsinfo[i]);
> > + VIR_FREE(fsinfo);
> > +
> > + return ret;
> > +}
> >
> > static int
> > qemuAgentGetFSInfoInternal(qemuAgentPtr mon, qemuAgentFSInfoPtr
> > **info,
> > diff --git a/src/qemu/qemu_agent.h b/src/qemu/qemu_agent.h
> > index 69b0176855..f6d74a2603 100644
> > --- a/src/qemu/qemu_agent.h
> > +++ b/src/qemu/qemu_agent.h
> > @@ -74,6 +74,11 @@ int qemuAgentFSThaw(qemuAgentPtr mon);
> > int qemuAgentGetFSInfo(qemuAgentPtr mon, virDomainFSInfoPtr
> > **info,
> > virDomainDefPtr vmdef);
> >
> > +int qemuAgentGetFSInfoParams(qemuAgentPtr mon,
> > + virTypedParameterPtr *params,
> > + int *nparams, int *maxparams,
> > + virDomainDefPtr vmdef);
> > +
> > int qemuAgentSuspend(qemuAgentPtr mon,
> > unsigned int target);
> >
> > diff --git a/tests/qemuagenttest.c b/tests/qemuagenttest.c
> > index aa1e993649..cf80711e95 100644
> > --- a/tests/qemuagenttest.c
> > +++ b/tests/qemuagenttest.c
> > @@ -168,38 +168,45 @@ testQemuAgentFSTrim(const void *data)
> >
> >
> > static int
> > -testQemuAgentGetFSInfo(const void *data)
> > +testQemuAgentGetFSInfoCommon(virDomainXMLOptionPtr xmlopt,
> > + qemuMonitorTestPtr *test,
> > + virDomainDefPtr *def)
> > {
> > - virDomainXMLOptionPtr xmlopt = (virDomainXMLOptionPtr)data;
> > - qemuMonitorTestPtr test = qemuMonitorTestNewAgent(xmlopt);
> > + int ret = -1;
> > char *domain_filename = NULL;
> > - virDomainDefPtr def = NULL;
> > - virDomainFSInfoPtr *info = NULL;
> > - int ret = -1, ninfo = 0, i;
> > + qemuMonitorTestPtr ret_test;
> > + virDomainDefPtr ret_def;
> >
> > - if (!test)
> > + if (!test || !def)
> > + return -1;
> > +
> > + if (!(ret_test = qemuMonitorTestNewAgent(xmlopt)))
> > return -1;
> >
> > if (virAsprintf(&domain_filename,
> > "%s/qemuagentdata/fsinfo.xml",
> > abs_srcdir) < 0)
> > goto cleanup;
> >
> > - if (!(def = virDomainDefParseFile(domain_filename,
> > driver.caps, xmlopt,
> > - NULL,
> > VIR_DOMAIN_DEF_PARSE_INACTIVE)))
> > + if (!(ret_def = virDomainDefParseFile(domain_filename,
> > driver.caps, xmlopt,
> > + NULL,
> > VIR_DOMAIN_DEF_PARSE_INACTIVE)))
> > goto cleanup;
> >
> > - if (qemuMonitorTestAddAgentSyncResponse(test) < 0)
> > + if (qemuMonitorTestAddAgentSyncResponse(ret_test) < 0)
> > goto cleanup;
> >
> > - if (qemuMonitorTestAddItem(test, "guest-get-fsinfo",
> > + if (qemuMonitorTestAddItem(ret_test, "guest-get-fsinfo",
> > "{\"return\": ["
> > " {\"name\": \"sda1\",
> > \"mountpoint\": \"/\","
> > + " \"total-bytes\":952840192,"
> > + " \"used-bytes\":229019648,"
> > " \"disk\": ["
> > - " {\"bus-type\": \"ide\","
> > + " {\"serial\":
> > \"ARBITRARYSTRING\","
> > + " \"bus-type\": \"ide\","
> > " \"bus\": 1, \"unit\": 0,"
> > " \"pci-controller\": {"
> > " \"bus\": 0, \"slot\": 1,"
> > " \"domain\": 0,
> > \"function\": 1},"
> > + " \"dev\": \"/dev/sda1\","
> > " \"target\": 0}],"
> > " \"type\": \"ext4\"},"
> > " {\"name\": \"dm-1\","
> > @@ -221,6 +228,32 @@ testQemuAgentGetFSInfo(const void *data)
> > " {\"name\": \"sdb1\","
> > " \"mountpoint\": \"/mnt/disk\","
> > " \"disk\": [], \"type\":
> > \"xfs\"}]}") < 0)
> > + goto cleanup;
> > + *test = ret_test;
> > + ret_test = NULL;
> > + *def = ret_def;
> > + ret_def = NULL;
> > + ret = 0;
> > +
> > + cleanup:
> > + VIR_FREE(domain_filename);
> > + if (ret_test)
> > + qemuMonitorTestFree(ret_test);
> > + virDomainDefFree(ret_def);
> > +
> > + return ret;
> > +}
> > +
> > +static int
> > +testQemuAgentGetFSInfo(const void *data)
> > +{
> > + virDomainXMLOptionPtr xmlopt = (virDomainXMLOptionPtr)data;
> > + qemuMonitorTestPtr test = NULL;
> > + virDomainDefPtr def = NULL;
> > + virDomainFSInfoPtr *info = NULL;
> > + int ret = -1, ninfo = 0, i;
> > +
> > + if (testQemuAgentGetFSInfoCommon(xmlopt, &test, &def) < 0)
> > goto cleanup;
> >
> > if ((ninfo = qemuAgentGetFSInfo(qemuMonitorTestGetAgent(test),
> > @@ -295,7 +328,157 @@ testQemuAgentGetFSInfo(const void *data)
> > for (i = 0; i < ninfo; i++)
> > virDomainFSInfoFree(info[i]);
> > VIR_FREE(info);
> > - VIR_FREE(domain_filename);
> > + virDomainDefFree(def);
> > + qemuMonitorTestFree(test);
> > + return ret;
> > +}
> > +
> > +static int
> > +testQemuAgentGetFSInfoParams(const void *data)
> > +{
> > + virDomainXMLOptionPtr xmlopt = (virDomainXMLOptionPtr)data;
> > + qemuMonitorTestPtr test = NULL;
> > + virDomainDefPtr def = NULL;
> > + virTypedParameterPtr params = NULL;
> > + int nparams = 0, maxparams = 0;
> > + int ret = -1;
> > + unsigned int count;
> > +
> > + if (testQemuAgentGetFSInfoCommon(xmlopt, &test, &def) < 0)
> > + goto cleanup;
> > +
> > + if (qemuAgentGetFSInfoParams(qemuMonitorTestGetAgent(test),
> > + ¶ms, &nparams, &maxparams,
> > def) < 0) {
> > + virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
> > + "Failed to execute
> > qemuAgentGetFSInfoParams()");
> > + goto cleanup;
> > + }
> > +
> > + if (virTypedParamsGetUInt(params, nparams, "fs.count", &count)
> > < 0) {
> > + virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
> > + "expected filesystem count");
> > + goto cleanup;
> > + }
> > +
> > + if (count != 3) {
> > + virReportError(VIR_ERR_INTERNAL_ERROR,
> > + "expected 3 filesystems information, got
> > %d", count);
> > + ret = -1;
> > + goto cleanup;
> > + }
> > + const char *name, *mountpoint, *fstype, *alias, *serial;
> > + unsigned int diskcount;
> > + unsigned long long bytesused, bytestotal;
> > + if (virTypedParamsGetString(params, nparams, "fs.2.name",
> > &name) < 0 ||
> > + virTypedParamsGetString(params, nparams,
> > "fs.2.mountpoint", &mountpoint) < 0 ||
> > + virTypedParamsGetString(params, nparams, "fs.2.fstype",
> > &fstype) < 0 ||
> > + virTypedParamsGetULLong(params, nparams, "fs.2.used-
> > bytes", &bytesused) <= 0 ||
> > + virTypedParamsGetULLong(params, nparams, "fs.2.total-
> > bytes", &bytestotal) <= 0 ||
> > + virTypedParamsGetUInt(params, nparams, "fs.2.disk.count",
> > &diskcount) < 0 ||
> > + virTypedParamsGetString(params, nparams,
> > "fs.2.disk.0.alias", &alias) < 0 ||
> > + virTypedParamsGetString(params, nparams,
> > "fs.2.disk.0.serial", &serial) < 0) {
> > + virReportError(VIR_ERR_INTERNAL_ERROR,
> > + "Missing an expected parameter for sda1 (%s,%s)",
> > + name, alias);
> > + ret = -1;
> > + goto cleanup;
> > + }
> > + if (
> > + STRNEQ(name, "sda1") ||
> > + STRNEQ(mountpoint, "/") ||
> > + STRNEQ(fstype, "ext4") ||
> > + bytesused != 229019648 ||
> > + bytestotal != 952840192 ||
> > + diskcount != 1 ||
> > + STRNEQ(alias, "hdc") ||
> > + STRNEQ(serial, "ARBITRARYSTRING"))
> > + {
> > + virReportError(VIR_ERR_INTERNAL_ERROR,
> > + "unexpected filesystems information returned for sda1
> > (%s,%s)",
> > + name, alias);
> > + ret = -1;
> > + goto cleanup;
> > + }
> > +
> > + const char *alias2;
> > + if (virTypedParamsGetString(params, nparams, "fs.1.name",
> > &name) < 0 ||
> > + virTypedParamsGetString(params, nparams,
> > "fs.1.mountpoint", &mountpoint) < 0 ||
> > + virTypedParamsGetString(params, nparams, "fs.1.fstype",
> > &fstype) < 0 ||
> > + virTypedParamsGetULLong(params, nparams, "fs.1.used-
> > bytes", &bytesused) == 1 ||
> > + virTypedParamsGetULLong(params, nparams, "fs.1.total-
> > bytes", &bytestotal) == 1 ||
> > + virTypedParamsGetUInt(params, nparams, "fs.1.disk.count",
> > &diskcount) < 0 ||
> > + virTypedParamsGetString(params, nparams,
> > "fs.1.disk.0.alias", &alias) < 0 ||
> > + virTypedParamsGetString(params, nparams,
> > "fs.1.disk.1.alias", &alias2) < 0) {
> > + virReportError(VIR_ERR_INTERNAL_ERROR,
> > + "Incorrect parameters for dm-1 (%s,%s)",
> > + name, alias);
> > + ret = -1;
> > + goto cleanup;
> > + }
> > + if (STRNEQ(name, "dm-1") ||
> > + STRNEQ(mountpoint, "/opt") ||
> > + STRNEQ(fstype, "vfat") ||
> > + diskcount != 2 ||
> > + STRNEQ(alias, "vda") ||
> > + STRNEQ(alias2, "vdb")) {
> > + virReportError(VIR_ERR_INTERNAL_ERROR,
> > + "unexpected filesystems information returned for dm-1
> > (%s,%s)",
> > + name, alias);
> > + ret = -1;
> > + goto cleanup;
> > + }
> > +
> > + alias = NULL;
> > + if (virTypedParamsGetString(params, nparams, "fs.0.name",
> > &name) < 0 ||
> > + virTypedParamsGetString(params, nparams,
> > "fs.0.mountpoint", &mountpoint) < 0 ||
> > + virTypedParamsGetString(params, nparams, "fs.0.fstype",
> > &fstype) < 0 ||
> > + virTypedParamsGetULLong(params, nparams, "fs.0.used-
> > bytes", &bytesused) == 1 ||
> > + virTypedParamsGetULLong(params, nparams, "fs.0.total-
> > bytes", &bytestotal) == 1 ||
> > + virTypedParamsGetUInt(params, nparams, "fs.0.disk.count",
> > &diskcount) < 0 ||
> > + virTypedParamsGetString(params, nparams,
> > "fs.0.disk.0.alias", &alias) == 1) {
> > + virReportError(VIR_ERR_INTERNAL_ERROR,
> > + "Incorrect parameters for sdb1 (%s,%s)",
> > + name, alias);
> > + ret = -1;
> > + goto cleanup;
> > + }
> > + if (STRNEQ(name, "sdb1") ||
> > + STRNEQ(mountpoint, "/mnt/disk") ||
> > + STRNEQ(fstype, "xfs") ||
> > + diskcount != 0 ||
> > + alias != NULL) {
> > + virReportError(VIR_ERR_INTERNAL_ERROR,
> > + "unexpected filesystems information returned for sdb1
> > (%s,%s)",
> > + name, alias);
> > + ret = -1;
> > + goto cleanup;
> > + }
> > +
> > + if (qemuMonitorTestAddAgentSyncResponse(test) < 0)
> > + goto cleanup;
> > +
> > + if (qemuMonitorTestAddItem(test, "guest-get-fsinfo",
> > + "{\"error\":"
> > + " {\"class\":\"CommandDisabled\"
> > ,"
> > + " \"desc\":\"The command guest-
> > get-fsinfo "
> > + "has been disabled
> > for "
> > + "this instance\","
> > + " \"data\":{\"name\":\"guest-
> > get-fsinfo\"}"
> > + " }"
> > + "}") < 0)
> > + goto cleanup;
> > +
> > + if (qemuAgentGetFSInfoParams(qemuMonitorTestGetAgent(test),
> > ¶ms,
> > + &nparams, &maxparams, def) != -1)
> > {
> > + virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
> > + "agent get-fsinfo command should have
> > failed");
> > + goto cleanup;
> > + }
> > +
> > + ret = 0;
> > +
> > + cleanup:
> > + virTypedParamsFree(params, nparams);
> > virDomainDefFree(def);
> > qemuMonitorTestFree(test);
> > return ret;
> > @@ -1288,6 +1471,7 @@ mymain(void)
> > DO_TEST(FSFreeze);
> > DO_TEST(FSThaw);
> > DO_TEST(FSTrim);
> > + DO_TEST(GetFSInfoParams);
> > DO_TEST(GetFSInfo);
> > DO_TEST(Suspend);
> > DO_TEST(Shutdown);
>
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